Automatic weighing-machine



(No Model.)

AAfMEYER.

2 SheetsSheet 1.

AUTOMATIC WEIGHING MACHINE:

Patented Dec.21,1897.

F5213 w z (No Model.) 2 Sheets-Sheet 2. A. A. MEYER.

- AUTOMATIC WEIGHING MACHINE.

Patented Dec. 21,1897.

[Eran/fur UNITED STATES PATENT Onrrcn.

ANDREXV A. MEYER, OF BOSTON, MASSACHUSETTS.

AUTOMATIC WElGHlNG-MACHEN SPECIFICATION forming part of Letters Patent N 0. 596,006, dated December 21, 1897. Application filed April 28, 1897. Serial No. 634,224. (No model.)

To all whom, it may concern.-

Be it known that 1, ANDREW A. MEYER, a citizen of the United States, and a resident of Boston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Automatic lVeighing-Machines, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to certain improvements in automatic weighing-machines.

The invention consists in the peculiar arrangement of levers for supporting the platform, in the means of transmitting motion from same to a shaft carrying a drum or cylinder having a series of numbers arranged spirally upon its periphery whereby said cylinder is moved and the weight indicated, and also in means for operating a shield (to dis close the weight) by a coin, as hereinafter set forth, and pointed out in the claims.

Referring to the accompanying drawings, Figure 1 represents a vertical longitudinal section of an automatic weighing-machine embodying my invention. Fig. 2 is a vertical transverse section of same. Fig. 3 is a horizontal section taken on line was of Fig. 1. Figs. 4, 5, and 6 are respectively a side view, a plan, and an end view of the mechanism for operatingthe cylinder, and the coin-operatin g device for disclosing the weight.

A represents the base; B, the platform, which is formed with four lugs b b Z) Z) 011 its under side. To the lower end of the front lugs 19 are secured the outer ends of long levers O O, fulcrumed to lugs a on the side of the base A, and "to the rear lugs Z) are secured the ends of short levers O, fulcrumed to lugs a on the side of the base A. The rear portion of these levers are bent in toward the center and come near together at their outer ends, upon which ends a bar D rests. The distance from the fulcrum of the long levers to their respective ends and the distance from the fulcrum of the short levers to their re spective ends are proportionally the same, so that no matter on what part of the platform B the weight is placed the bar D will be raised as effectually as if the weight was placed in the center of the platform. Through the center of the bar D passes a rod E, the bar being secured thereto by a set-screw.

The rod E is guided at its lower end in a stand ard e and extends up for a short distance above a plate F, a strong spiral spring G being interposed between the bar D and plate F by which the pressure on the ends of the levers O O is regulated. To the upper end of the rod E is secured a collar f, in which is also secured the lower end of a rod E. Said rod is bent to the rear and passes up through the casing F, that rests upon the base A.

The upper end of the rod E passes through a lug H on the casing F, and a short distance below the lug a collarf is adjustably secured to the rod. A light spiral spring G is interposed between them. The object of the spring G is to hold the bar D down in its normal position, and that of the spring G is for adjusting and preventing the rod E being thrown up too suddenly. The upper end of the rod E is formed with a rack E, that is in gear with a pinion I, mounted upon a short shaft or spindle J, (see Figs. 4, 5, and (5,) carried by suitable bearings. Secured to or formed in one with the pinion I is a cog-wheel K, that is in gear with a pinion L, secured on a shaft M, carried in bearings N, and mounted upon this shaft is a drum or cylinder P, to which is secured a worm Q, the drum and worm being held on the shaft by a feather and groove, so that they will turn with the shaft, but be free to travel thereon. R is a finger secured to the plate S and fits into the thread of the worm, so that the latter will be fed forward or backward, according to the direction the shaft M is rotated.

The under side of the plate S is formed with a bracket .9, to which the end of a lever T is fulcrumed, the outer end of which is held in a raised position by a springt and is fitted with a plate '6, upon which the coin falls. This lever is also formed with a small notch 25 that holds a lever U in the locked position. This lever U is fulcrumed to a standard at u, and a spring 1 draws the upper end away from the drum or cylinder P as soon as its lower end is released, and thus withdraws a shield U, secured to its upper end, and thus exposes the figures on the drum or cylinder P. To the bracket 5 is also fulcrumed a lever \V, notched at its inner end and fitted with a pin to at its outer end and is held in position by a spring 2. X is a short rod chisel-pointed at its lower end, which fits into the notch in the lever \V and is normally held in the raised position. The upper portion of this red X passes through the plate S, a pin a; preventing it being forced beyond a certain distance. Upon the upper end of the rod X rests one end of a trigger Y, held thereon by a spring '1 This trigger is fulcrumed to a standard on the plate S, and its inner end comes in contact with a series of pins L on the inner face of the wheel K, so that as the wheel K is rotated in one direction the pins 7e will depress the end of the trigger Y, but when rotated in the opposite direction one of the pins will raise the end of the trigger, thus causing its other end to depress the rod X, and with -it the inner end of the lever XV, thus raising its outer end, when the pin 20 comes into con tact with the lower end of the lever U and forces the lower end of the leverin and throws its upper end outward, so that the shield U will again cover the figures on the drum or cylinder P.

The operation is as follows: A weight being placed upon the platform B causes it to be pressed down, thus exerting pressure upon the outer ends of thel evers C C C G andcauses their inner ends to be raised, thus lifting the bar D, and with it the rods E E. The rack on the upper end of the rod E imparts motion to the pinion I and cog-wheel K, that transmits motion to the pinion L on shaft M, causing it to rotate, and with it the worm Q and drum or cylinder P, the finger It causing the worm and drum to be fed along the shaft until the figures on the drum indicating the weight have been brought to the proper point. A coin now being inserted into the slot falls upon the plate '6 on the lever T, the weight of the coin causing the outer end of the lever to be depressed, so that the lever U is released, which is by the spring 4; then thrown so that the shield U will expose the figures on the drum or cylinderP. Upon the weight being removed from the platform B the springs G G force the rods E E down, the rack E on the upper end causing the pinion l, and with it the cog-wheel K, to be turned in the reverse direction, and said cog-wheel turning the pinion L on shaft M brings the worm and drum back to their normal position. At the same time the pins 76, coming into contact with the trigger Y, cause it to depress the red X, which, acting upon the lever V, causes the pin to to come into contact with the side of the lever U and force it back until its lower end enters the notch t in the lever T, when the shield U will again cover the figures on the drum or cylinder P. Thus the machine is reset ready for another operation.

Although I have shown and described the weighing-machine in connection with a coinoperating device for disclosing the weight, it is obvious that the machine might be constructed for ordinary weighing purposes with out said coin-operating device, in which case a finger would be employed to point to the figures on the drum or cylinder.

lVhat I claim is 1. In a weighing-machine a pair of long levers and a pair of short levers, each connected at its outer end to lugs on the under side of the platform and a cross-bar resting upon their inner ends, each of said levers being fulcrumed to the sides of the base, the distance from the fulcrum of the long levers to their respective ends and the distance from the fulcrum of the short levers to their respective ends being proportionately the same substantially as set forth.

2. In a weighing-machine a pair of long levers and a pair of short levers, each con nected at the outer ends to lugs on the under side of the platform, each of said levers being fulcrumed to the sides of the base, the distance from the fulcrum of the. long lovers to their respective ends and the distance from the fulcrum of the short levers to their respective ends being proportionally the same, whereby the inner ends of all the levers will be raised equally when the platform is de pressed in combination with a cross-bar rest ing upon the inner ends of said levers and a rod passing through said bar for operating a weight-indicatin g mechanism substantially as set forth.

3. In a weighing-machine a pair of long and a pair of short levers arranged as described in combination with a cross-bar resting upon their inner ends and a rod passing through said cross-bar, a rack on the upper end of said rod operating a pinion and mechanism for causing a drum or cylinder to 1'0- tate and indicate the weight substantially as set forth.

4:. In a weighing-machine a drum or cylinder having numbers indicating weights around its periphery and having a hub proj ecting on one side, a worm. on the periphery of said projecting portion, said cylinder being mounted upon a shaft so as to turn and slide thereon and gearing such as described for operating same when a weight is placed upon the platform as set forth.

5. In a weighing-machine a rod operated upon the depression of the platform, a rack on the upper end of said rod, a pinion in gear with said rack, a cog-wheel secured to said pinion, a shaft having a pinion secured there on, a drum and worm mounted upon said shaft so as to rotate with but slide upon the same and a finger for causing the worm to travel along the shaft as it is rotated substantially as set forth.

6. In a coin-operating device a lever T, fulcrumed to a bracket 5', and a spring t, for holding its outer end normally in a raised position, a lever U, fulcrumed at n, its lower end fitting into a notch in the lever 'l, a lever XV notched at its inner end, a bar X, resting in said notch, a pin 10, in end of said lever \V, and a trigger Y, the end of which is held in contact with the top of the IIO bar X, by a spring y, in combination with a Wheel K, having a series of pins 70, on its inner face and means for causing said Wheel K, to be rotated first in one and then in the opposite direction substantially as set forth.

'7. In a coin-operated Weighing-machine a drum or cylinder P, having numbers spirally arranged upon its periphery, a Worm attached thereto, means such as described for causing the drum or cylinder to rotate with and slide upon the shaft in combination with a shield upon the end of a fulcrumed lever and means for causing the shield to be Withdrawn to disclose the Weight and to again resume its normal position substantially as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing Witnesses, on this 1st day of March, A. D. 1897.

ANDREXV A. MEYER.

lVitnesses:

ALBERT P. WoRTHEN, EDWIN PLANTA. 

